Note 17 - Fair Value of Financial Instruments (Detail) - Financial assets and liabilities reported under the fair value option: (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Changes in Fair Values For Items Measured at Fair Value Pursuant to Election of the Fair Value Option	$ 55		$ 1,960		$ 47
Borrowed funds	55		1,960		47
Net gain from fair value adjustments (1) (2)	55		1,960		47
Collateralized Mortgage Backed Securities [Member]
Fair Value Measurements	24,911		37,787
Changes in Fair Values For Items Measured at Fair Value Pursuant to Election of the Fair Value Option	(539)		(665)		774
Borrowed funds	(539)		(665)		774
Net gain from fair value adjustments (1) (2)	(539)		(665)		774
Other Securities [Member]
Fair Value Measurements	29,577		30,942
Changes in Fair Values For Items Measured at Fair Value Pursuant to Election of the Fair Value Option	796		(1,138)		618
Borrowed funds	796		(1,138)		618
Net gain from fair value adjustments (1) (2)	796		(1,138)		618
Borrowed Funds [Member]
Changes in Fair Values For Items Measured at Fair Value Pursuant to Election of the Fair Value Option	2,062		5,916		3,549
Borrowed funds	23,922		26,311
Borrowed funds	2,062		5,916		3,549
Net gain from fair value adjustments (1) (2)	2,062		5,916		3,549
Financial Assets And Liabilities, Excluding Interest Rate Caps / Swaps [Member]
Changes in Fair Values For Items Measured at Fair Value Pursuant to Election of the Fair Value Option	2,319	[1],[2]	4,113	[1],[2]	4,941	[1],[2]
Borrowed funds	2,319	[1],[2]	4,113	[1],[2]	4,941	[1],[2]
Net gain from fair value adjustments (1) (2)	$ 2,319	[1],[2]	$ 4,113	[1],[2]	$ 4,941	[1],[2]

[1] The net gain from fair value adjustments presented in the above table does not include net losses of $0.3 million, $2.2 million and $4.9 million from the change in the fair value of interest rate caps recorded during the years ended December 31, 2012, 2011 and 2010, respectively.

[2] The net gain from fair value adjustments presented in the above table does not include a net loss of $1.9 million from the change in the fair value of interest rate swaps recorded during the year ended December 31, 2012.